This documentary, in the form of a Google Map, matches Lewis and Clark's daily progress with their journal entries and enables you to zoom right in on each location in a terrain map that gives you some idea of what it looked like to Lewis and Clark. Thus, you can experience the expedition by digitally walking up river and read Lewis and Clark's words about each location and the map can provide directions, point of interest and hotel information. http://myreadingmapped.blogspot.com/